Pest control using Neem oil

11 years ago

Hi
I have a problem with Aphids and mites.
some of my impatiens look very sick and i have noticed thay have green 1mm Aphids and tiny like dust specs mites.
The leaves get deformed then falls off , and there is an excess of brunching that does not really develop.
flowers don't really open but shrink and fall.

I sprayed few of them with "nimpar" something that contains NEEM OIL+ PYRETHRUM

the plants which i sprayed dies within 3 days because of it.

I decided to concoct my own medicine.
I ordered pure cold pressed organic neem oil , and i want to use it.

I am afraid that i will kill the rest of the plants , because the others died from a bought ready to spray pesticide which contained neem oil.

can someone here explain to me how to prepare the neem oil spray in a way that will not harm Impatiens?
It seems that regular preparation or bought ready to spray neem oil based substances might be harmful for the delicate plants.

Sort by:Oldest

Comment (1)

patchyjack
11 years ago
Hello!

Do your Impatiens get any direct sun? If so, then any oily spray will cause them to be burnt, no matter how organic it is.
Neem oil sometimes works as a soil drench, though; you just mix up an 0.5% solution and water the plant with it. The roots suck it up into the branches and it can discourage certain types of pests. That shouldn't harm the plant.
I don't know if it works for aphids, though.
My favourite method for removing pests from impatiens is wiping with a wet sponge or simply spraying with the hose! It's surprisingly effective!

Are these the common Busy Lizzie type Impatiens, though? Because, if so, it's *possible* that they have downy mildew. If that's the case then it's best to pull the sick ones out and throw them in the garbage bin. (Not the compost!)
I recommend looking up Downy Mildew on Google to see if that's what your plants have.
Related Professionals
Florence Landscape Architects & Landscape Designers · California Landscape Architects & Landscape Designers · Toms River Landscape Architects & Landscape Designers · Portland Landscape Architects & Landscape Designers · Madison Landscape Architects & Landscape Designers · Leamington Landscape Architects & Landscape Designers · Shreveport Landscape Contractors · Abilene Landscape Contractors · Newport News Landscape Contractors · Chillicothe Landscape Contractors · Stamford Landscape Contractors · Gloucester Landscape Contractors · Manchester Landscape Contractors · Portsmouth Landscape Contractors · Champaign Architects & Building Designers